Improvement in grain-car doors



G. F. DAVID '& C. WILDING.

Grain-Car Door.

N0.167',228. PatentedAug- 31,1875.

Inventors N. PETERS, PHUTGLITHOGRAPMER, wAsHmGr v NITE STATES GEORGE F.DAVID AND CHARLES WILDING, OF. INDIANAPOLIS, INDIANA.

IMPROVEMENT IN GRAIN-CAR DOORS.

Specification forming part of Letters Patent No. 167,228, dated August31, 1875; application filed May 19, 1875.

To all whom it may concern:

Be it known that we, GEORGE F. DAVID and CHARLES WILDING, ofIndianapolis, county of Marion and State of Indiana, have invented a newand useful Mode of Removing Grain-Doors from GraiuOars, to accomplishwhich we have arranged a double door, hinged on the inside, which isforced outward, when unfastened, by the weight and pressure of the grainthat is inside of the car.

We are aware that double doors hinged at the middle, and the outer edgessecured in grooves or pieces attached to the door-frame, have been usedbefore. Such is the case in' the patent to H. Stahlnecker, January 23,1875 but he makes a specialty of describing his invention as not openingoutward, but inward, and calls special attention to the fact that thegrain must press against the inside of the double doors, and thus holdthem tight together.

Our invention is for a different purpose, and the results produced byour invention are entirely different.

The following is a description of our invention, which to make completewe are necessitated to employ some old devices in combination, as shownin our claim.

Figure 1 represents a front view of the double doors inserted in thedoor-frame of a grain-canon the inside of which are 'arranged hinges onthe vertical jointin the center, and on the outside are arranged thefastenings, all of which illustrates our invention. Fig. 2 is a top viewof the same, the doors being closed and fastened. Fig. 3 is a top viewof the same as unfastened, and the grain forcing them outward from thecar.

In the drawings, the car-door is represented between the sill O, roof B,and side posts 0 C. In this openingwe arrange the double doors D D,hinged together at the vertical joint in the center by the hinges P,which must be on the inside of the car, not on the outside. The outerends of the doors D D, that enter the grooves or sockets R R, arerounded on the inside, so as to allow the doors to swing outward whenunfastened, and not come-in contact with the inside edges of the groovesor sockets B B. On the front side of one of the doors, as D, is securelybolted a bar, H. The end that passes by the vertical joint in the centerof the doors is provided with a slot, K, which fits over the projectingkey-holder L. This key-holder is also securely bolted to the oppositehalf of the door, as at D, and has a proper hole to receive the key J inthe projecting part.

These two doors, when closed and secured by the key J, are held wedged,as in Figs. 1 and 2. Here it will be seen that the key-holder L has beeninserted in the slot K of the bar H, and the key J in its seat on theoutside of the doors D D. The grain can then be loaded, and the naturaltendency is to force the doors D D open, instead of making them tighter,as in the patent to Stahlnecker, and when it becomes necessary to unloadthe grain, as into the pits of an elevator, all that is necessary is toremove the key J, and the pressure of grain inside of the car forces thedoors D D away from the car outwardly, as in Fig. 3, and thegrainrunsiout, thus relieving the men in charge of loading or unloadingthe cars of the necessity of prying out the doors, as is the habit withthe ordinary doors used for this purpose. The key J is secured to thedouble doors by a chain, and the double doors are also secured to thecar in the same manner, to prevent them from being lost.

The advantage of a double door opening outwardly from the car canreadily be seen over all doors that have to be pried up, or

' gether on the inside, so as to allow the doors to open outwardly, andsecured together, when inserted in the door-frame, by a bar, H, having aslot, K, at one end, to receive the key-holder L and key J, constructedandarranged to operate substantially as specified.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

GEORGE E. DAVID. CHARLES WILDING.

